SI Estimate Transfer Function Model VI

SI Estimate Continuous Transfer Function Model (SISO Waveform)

	delay initial guess (s) specifies the initial guess of the system delay, in seconds. The default is NaN, which means no delay exists in this transfer function.
	stimulus signal specifies the input waveform of the stimulus signal.
	response signal specifies the input waveform of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2. The value of den order must be greater than the value of num order.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1s + + bmsm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1s + + ansn.
	delay (s) returns the estimated delay of the system in seconds.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Continuous Transfer Function Model (SISO Array)

	delay initial guess (s) specifies the initial guess of the system delay, in seconds. The default is NaN, which means no delay exists in this transfer function.
	stimulus signal specifies the input array of the stimulus signal.
	response signal specifies the input array of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2. The value of den order must be greater than the value of num order.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	sampling rate is the signal sampling rate in hertz. The value of sampling rate must be greater than 0.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1s + + bmsm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1s + + ansn.
	delay (s) returns the estimated delay of the system in seconds.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Continuous Transfer Function Model (MISO Waveform)

	delay initial guesses (s) specifies the initial guess of the system delay. The default is NaN, which means no delay exists in this transfer function.
	stimulus signals specifies the input waveform array of the stimulus signals. Each element of the array is the waveform of one stimulus signal.
	response signal specifies the input waveform of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function (TF) model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2. The value of den order must be greater than the value of num order.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1s + + bmsm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1s + + ansn.
	delays (s) returns the estimated delay of the system in seconds.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Continuous Transfer Function Model (MISO Array)

	delay initial guesses (s) specifies the initial guess of the system delay. The default is NaN, which means no delay exists in this transfer function.
	stimulus signals specifies the input array of the stimulus signals. Each row in the array is one stimulus signal.
	response signal specifies the input array of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function (TF) model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2. The value of den order must be greater than the value of num order.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	sampling rate is the signal sampling rate in hertz. The value of sampling rate must be greater than 0.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1s + + bmsm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1s + + ansn.
	delays (s) returns the estimated delay of the system in seconds.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Discrete Transfer Function Model (Direct SISO Waveform)

	stimulus signal specifies the input waveform of the stimulus signal.
	response signal specifies the input waveform of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1z + + bmzm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1z + + anzn.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Discrete Transfer Function Model (Direct SISO Array)

	stimulus signal specifies the input array of the stimulus signal.
	response signal specifies the input array of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	sampling rate is the signal sampling rate in hertz. The value of sampling rate must be greater than 0.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1z + + bmzm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1z + + anzn.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Discrete Transfer Function Model (Indirect SISO Waveform)

	discrete controller specifies information about the discrete, linear controller, such as the controller numerator, controller denominator, and controller structure.
	reference signal is the input waveform of the reference signal.
	response signal specifies the input waveform of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	tolerance determines zero-pole cancellations. If the difference between the location of a pole and a zero is within the tolerance, this VI removes the zero-pole pair.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1z + + bmzm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1z + + anzn.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Discrete Transfer Function Model (Indirect SISO Array)

	discrete controller specifies information about the discrete, linear controller, such as the controller numerator, controller denominator, and controller structure.
	reference signal is the input array of the reference signal.
	response signal specifies the input array of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	sampling rate is the signal sampling rate in hertz. The value of sampling rate must be greater than 0.
	tolerance determines zero-pole cancellations. If the difference between the location of a pole and a zero is within the tolerance, this VI removes the zero-pole pair.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1z + + bmzm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1z + + anzn.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Discrete Transfer Function Model (Joint SISO Waveform)

	reference signal is the input waveform of the reference signal.
	stimulus signal specifies the input waveform of the stimulus signal.
	response signal specifies the input waveform of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1z + + bmzm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1z + + anzn.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Discrete Transfer Function Model (Joint SISO Array)

	reference signal is the input array of the reference signal.
	stimulus signal specifies the input array of the stimulus signal.
	response signal specifies the input array of the response signal.
	orders of transfer function model specifies the numerator and denominator orders of the transfer function model. num order specifies the numerator order of the system model. The default value is 1. den order specifies the denominator order of the system model. The default value is 2.
	error in describes error conditions that occur before this VI or function runs. The default is no error. If an error occurred before this VI or function runs, the VI or function passes the error in value to error out. This VI or function runs normally only if no error occurred before this VI or function runs. If an error occurs while this VI or function runs, it runs normally and sets its own error status in error out. Use the Simple Error Handler or General Error Handler VIs to display the description of the error code. Use error in and error out to check errors and to specify execution order by wiring error out from one node to error in of the next node. status is TRUE (X) if an error occurred before this VI or function ran or FALSE (checkmark) to indicate a warning or that no error occurred before this VI or function ran. The default is FALSE. code is the error or warning code. The default is 0. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source specifies the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning. The default is an empty string.
	sampling rate is the signal sampling rate in hertz. The value of sampling rate must be greater than 0.
	system model out returns information about the model structure, nominal or estimated parameters, identification result, and so on. Use the Model Management VIs to retrieve the information system model out contains. Note  You can use a customized system model probe to view model information that flows through system model wires when you debug a block diagram created with the System Identification VIs. Right-click a system model wire and select Custom Probe»SI System Model from the shortcut menu to use the system model probe.
	coefficients of transfer function model returns the coefficients of the transfer function model. numerator returns the numerator coefficients of the transfer function model, in ascending order. The coefficients take the following form: b0 + b1z + + bmzm. denominator returns the denominator coefficients of the transfer function model, in ascending order. The coefficients take the following form: a0 + a1z + + anzn.
	error out contains error information. If error in indicates that an error occurred before this VI or function ran, error out contains the same error information. Otherwise, it describes the error status that this VI or function produces. Right-click the error out front panel indicator and select Explain Error from the shortcut menu for more information about the error. status is TRUE (X) if an error occurred or FALSE (checkmark) to indicate a warning or that no error occurred. code is the error or warning code. If status is TRUE, code is a nonzero error code. If status is FALSE, code is 0 or a warning code. source describes the origin of the error or warning and is, in most cases, the name of the VI or function that produced the error or warning.

SI Estimate Transfer Function Model Details

The SI Estimate Transfer Function Model VI supports SISO and MISO systems for continuous models. You can provide an initial guess to the system delay using the delay initial guess (s) or delay initial guesses (s) input.

The SI Estimate Transfer Function Model VI supports only SISO systems for discrete models. This VI provides three methods to estimate discrete models: the direct, indirect, and joint input-output methods. The direct method works for both open-loop and closed-loop data. The indirect and joint input-output methods are used only for closed-loop data.

Examples

Refer to the following VIs for examples of using the SI Estimate Transfer Function Model VI:

• Discrete Transfer Function Model (Direct Method) VI: labview\examples\System Identification\Getting Started\Closed-Loop Estimation.llb

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• Discrete Transfer Function Model (Indirect Method) VI: labview\examples\System Identification\Getting Started\Closed-Loop Estimation.llb

   Open example  Browse related examples

• Discrete Transfer Function Model (Joint Input-Output Method) VI: labview\examples\System Identification\Getting Started\Closed-Loop Estimation.llb

   Open example  Browse related examples